Cyclometer clock



May 9, 1939.

N. G. HORWITT CYCLOMETER. CLOCK Original Filed May 13, 1936 4Sheets-Sheet 1 INVENTOR Maf/70H6, b'wf BY M May 9, 1939- N. G. HoRwlTT2,157,540

CYCLOMETER CLOCK Original Filed May 13, 1936 4 Sheets-SheerI 2 INVENTORATTO R N EY May 9, 1939- N. G. HoRwnjTl 2,157,540

CYCLOMETER CLOCKv Original Filed May l5, 1936 4 Sheets-Sheet 3 BY /t/ YATTORNE? May 9, 1939- N. G. HoR-wlTT 2,157,540

CYCLOMETER `CLOCK Original Filed May 13, 1936 4 Sheets-Sheet 4 AlNvENToR Naf/rd 6. Hong/'ft Patented May 9, 1939 UNITED STATES PATENTori-ics Application May 13, 1936, Serial No. 79,449

Renewed October 3. 1938 l lis calm. I(ci. ss-izs) This invention relatesto a cyclometer clock having a construction which enables the hournumerals to be very large in proportion to the Asize of the clock. Asmall clock of my con- 3. struction will have these numerals legible ata considerable distance. .In clocks having all cylindrical dials ordrums, the numerals are marked on the periphery o1 the cylindrical drumswhich are placed next to each other about the same horizontal axis ofrotation. These drums require a bulky case and crowd the drivingmechanism. In. my mechanism there is only one ring dial or drum, the oneused for the hour numerals. My hour drum preferably rotates about avertical l5. axis enabling the numerals marked on its periphery to beincreased in height without substantially increasing the size of theclock. Numerals are normally higher than wide, so that much largernumerals can be used on my hour drum than in those of previous clocks,such as that shown in Patent No. 1,991,241, because the Widthand not theheight of the numerals is the con-a trolling factor in the diameter ofmy drum.

My preferred form has a casing with a spherical surface, said casingcomprising a complete sphere or a part of a sphere. In said casing anhour drum is rotatably mounted, said drum being in the form of aspherical zone with hour numerals on its periphery. There is an openingin the front of the casing through which the successive hour numeralsare exposed. A ring of minute numerals are marked on the front of thecasing about said opening, and means are provided to point out orindicate the successive minute numerals. The minute indicating means ispreferably a rotatably mounted plate having an opening thereinconcentric with the opening' in the casing, said plate having aspherical surface and a window in it which travels around in front ofthe minute numerals, successively exposing them.- The position of thiswindow corresponds at any time to the position of the minutehand on theordinary type of clock, making it unnecessary to change age old habitsof time telling. Contrasting colors used between that of the minutenumerals or their background land that of the minute disc, will aid anobserver at a considerable distance to estimate the time by the positionof the Window, even if he cannot read Vthe minute numerals. A lightbehind translucent minute numerals exposed at the window is alsoeffective in estimating the time at a distance.

The construction of my clock avoids the annoyance of the constantclicking present in clocks having' a cylindrical drum for the minutes,Where the drum is given a jump at the end of each minute. Only once anhour is there a click in my clock, as the hour ring or drum jumps at theend of an hour to expose the next hour numeral, my minute discpreferably being given a con- 5 tinuous rotation.

My clock may be constructed in a number of forms. Instead of having themeans for .presenting the hour numerals at the concentric openings o1'the casing and the minute indicating meansym in the form of a drum, saidformer means may be in the form of an endless belt, with the hournumerals thereon. The belt as it runs on its rollers presents thesuccessive hour numerals at said openings. E@

Other objects and advantages willbecome apparent upon a further study ofthe description and drawings, in Which:-.

Fig. 1 is a front elevation of the preferred form of my clock. 20

Fig. 2 is a section taken generally along the line 2-2 of Fig. 1.

Fig. 3 is a section taken along the line -i-3 of Fig. 1.

Fig. 4 is an elevation of the annular disc with 25 the minute window,said disc being shown by itself.

Fig. 5 is a perspective view of the hour ring or drum shown by itself.

Fig. 6 is a front-elevation of the main casing 30 shown by itself.

Fig. 7 is a front elevation oi' an alternative form of the clock inwhich the minute numerals rotate.

Fig. 8 is a partial sectionof the clock taken 35 along the line 8-8 ofFig. 7.

Fig. 9 is a side elevation of a form of the clock in which only aportion of the clock casing has a spherical surface.

Fig. l0 is a front elevation of the clock shown .3@ in Fig. 9.

Fig. 11 is a front elevation of a form of the clock in which the casingis cylindrical.

Fig. 12 is a horizontal section of the clock of rig. 11 in which thedrum is in the form of a 45' prism inscribed in the cylindrical casing,the driving mechanism being omitted.

Fig. 13 is a section of a clock having a casing in the form of a prism,the drum being in the form of a cylinder, the driving mechanism being 50omitted.

Fig. 14 is a horizontal section of a clock with a cylindrical casing',as in Fig. 1l, in which the drum is also cylindrical, the drivingmechanism being omitted. 55

Fig. 15 is a section through a two faced clock, the hour ring beingshown partially in elevation,

said section being taken along the line I5-I5 of Fig. 16.

Fig. 16 isa front elevation of the two faced clock.

Fig. 17 is a front elevation oan endless band type of clock.

Fig. 18 is a section taken along the line I8-I8 of Fig. 1'1, and

Fig. 19 is a section taken along the line I9-I9 of Fig. 1'1.

Main casing 9, which is spherical, is supported on feet III. A largeopening II (Fig. 6) is provided in the front of casing 9. The minutenumerals 0 to 59 are marked on casing 9, bordering opening I I. In thedrawings only some of the minute numerals are shown, it being readilyunderstood that a complete setof numerals are to Ibe provided.

Guide lugs I2 are provided on the front of casing 9. Annular minute discor plate I3, is rotatably mounted between lugs I2 and casing 9. As discI3 is rotated, by means to -be described later, minute window I4 exposes`the successive minute numerals located on the front of casing I aboutlarge opening I I. Disc I3 has a large window I9 which is concentricwith opening I I. The inside face of disc or plate I3 is provided with aring of bevel gear teeth I5. Disc I3 is set out in the form of a ridgeI6 at teeth I5, so that the distance from the center of the sphericalcasing 9 to the innermost point on saiii teeth is not less than theradius of the inside face of casing 9. This is so that teeth I5 willclear the outside face of hour ring or drum I1. Hour ring I1, which hasa. spherical contour, is a substantially hollow spherical zone,preferably symmetrical about a great circle of the casing, andpreferably that great circle which is the equator of the casing, theouter face of said zone having a radius substantially equal to that ofthe inside face of casing 9. Ring I1 is slidably mounted in casing 9 andis retained in position therein by guide lugs I8. The axis of rotationof hour ring or drum I1 is at right angles to the axis of rotation ofminute disc I3. Hour ring I1 has large numerals 1 to 12 around itsoutside face, which, as said ring is rotated, show successively throughlarge Window I9 of disc I3.

A synchronous electric clock motor 29 with the necessary reducinggearing, is used to drive hour ring I1 and disc I3. The motor shovm isdiagrammatic. In its place a spring clock motor could be used. A motorshaft 2| has. atits outer end a worm 22, which vmeshes with a worm wheel23 fixed to shaft 24. Shaft 24 has one end mounted in a bearing 25 oncasing 9 and the other lend in fixed disc 26, Figs. 2 and 3. Disc 26 ismounted on casing 9 by a pedestal 21. On the end of shaft 24 away fromworm wheel 23 is fixed a gear 28 which meshes with an idler gear 29.Idler gear 29 meshes with gear 30 fixed on short shaft 3|. Fixed toshort shaft 3|, adjacent to idler gear 29, is bevel gear 32 which mesheswith bevel gear teeth I5 on minute disc I3. For driving hour ring I1, acam 33 is provided xed to shaft 24, said cam having a low spot 34 formedin its periphery. A lever 35 is pivotally mounted on fixed disc 26. Theinner end of said lever carries a cam roller 36. The outer end of lever35 has a pawl 31 pivotally mounted on it. Pawl 31 is normally springpressed outward by spring 55. Hour ring I1 is provided on its insidewith twelve ratchet teeth 38 which are successively engaged by pawl 31.The mechanism for driving hour ring I1 is similar to that shown in U. S.Patent No. 2,001,195, May 14, 1935.

The gear train comprising gears 28, 29, 30, 32 and ring o-f bevel gearteeth I5 is so proportioned that one revolution of shaft 24 occurs foreach revolution of minute disc I3. Thus low spot 34 comes oppositeroller 36 once each hour. When this occurs, spring 39, pulling on lever35, snaps said roller into said low spot, causing paWl 31 to rotate hourring yI1 one-twelfth of a revolution and to expose the next hour numeralat window I9.

The driving mechanism rotates minute disc I3 with its window I4continuously, one revolution requiring an hours time. When minute discI3 has about finished exposing numeral' 59, hour ring I1 is caused tojump a one-twelfth revolution. The rotation of window I4 exposes thesuccessive minute numerals. The minutes can be determined or estimatedat a great distance from the clock, even if the minute numerals cannotbe read, by the position of window I4, just as by the minute-hand in anordinary clock.

In the alternative form shown in Figs. '1 and 8, the annular minute disc40, which is located inside main casing 42, is provided with the minutenumerals 0 to 59, while minute window 4|, which is formed in main casing42, is stationary. In the form shown the hour ring 43 rotates in theopposite direction to that shown for hour ring I1 in Fig. 1.

Similar driving mechanism is provided to that of my preferred form. Adriven shaft 44, has a gear 45 xed to its end which meshes with idlergear 46 which in turn drives a gear, not shown, xed to short shaft 48.Bevel gear 49, fixed to shaft 48 engages bevel gear ring 5U on the rearof minute disc 40, causing the latter to rotate once every hour. The camand pawl mechanism for driving hour ring 43, has the single notched cam5I xed to shaft 44 which trips lever 52 and its pawl 53 into ratchetteeth 54 turning hour ring 43 one-twelfth of a revolution each hour.

As minute disc 40 rotates behind Window 4I, the successive minutenumerals are exposed at window 4I. When minute numeral 59 leaves Window4|, lever 52 is tripped and the next hour numeral on hour ring 43 isexposed through the large front opening in casing 42 and minute disc 40.

The clock'of Figs. 9 and 10 has the lower portion 56 of its casingformed with a spherical surface. Its hour drum 51 is in the form of aspherical zone rotatably mounted in portion 56. The upper and loweredges 58 and 59, respectively, of drum 51 are symmetrically disposedabout a minor circle of lower portion 56 of the casing. In other wordsthe diameter of upper edge 58 is greater than that of lower edge 59.This zone differs from that formed by drum I1 of Figs. 1,

y2 and 5 in that the latter has its upper and lower edges symmetricallydisposed about a great circle of the spherical casing. The hour numeralsare disposed on the drum to appear vertically at opening 66. A plate 6I,having a substantially spherical surface, is rotatably mounted on thefront of portion 56 of the casing. It has a window 62 for indicating theminutes, and is in general similar to plate I3 of Figs. 1, 2, 3 and 4.

In Fig. 11 a clock is shown with a cylindrical?? casing 63, the hourdrum 64 being in the form of a cylinder as in Fig. 14. The numerals onthe hour drum are presented at opening 66. The minute disc 61 is a flatplate rotatably mounted .minute discs 8| and 88 are caused to revolve atin the forwardly extending portion 69 of casing 88. Disc 61 has a ringof' bevel gear teeth 13 upon it. An index notch 68, in disc 61, exposesthe minute numerals on flange 12 of portion 69 of casing 83, only the 18minute numeral being shown. i

Instead of the hour drum being cylindrical, it could be in the form of aprism, as drum 65 in Fig. 12. I

Fig. 13 is a section through a clock in which the casing is in the formof a prism. The hour drum 1| is shown as a cylinder inscribed in thecasing. Said drum could be given a polygonal form as in Fig. 12.

The mechanism for driving the hour drums and minute discs for the clocksillustrated in Figs. 9 to 14 inclusive is not shown, but as will beunderstood by those skilled in the art it is similar to that providedfor the clock of Figs. 1 to 6 inclusive.

Instead of using a minute window I4, in Figs. 1 and 4, which Window inreality is an index for indicating the successive minute numerals, otherforms of index means could be used, such as a window in the form ofnotch 68 in disc 61,

, Fig. 11.

Other modifications of my clock can be made and still come within thescope of my invention.

In Figs. 15 and 16 there is illustrated a two .V

faced clock of the general type of Fig. 1. Mounted to-rotate inside ofspherical casing 15, is a spherical zone or hour ring 16, having anupper set of hour numerals 11 and a lower set 18. Casing 15 has a frontwindow or opening 19 and a rear opening 80. Rotatably mounted justinside of casing 15 is annular minute disc or plate 8|, having itsopening 85 smaller than and concentric with opening 19. In Fig. 16, thehour numeral 12 of the lower set of hour numerals 18 is shown encircledby opening 85. Plate 8| is provided with a minute window 82 which assaid plate rotates exposes the successive minute numerals located onannular plate 83 iixed by stays 84 to the inside of casing 15. Theopening in plate 83 is substantially coincident with opening 85. For theposition of minute window 82 shown in Fig. 16, the minute numeral 30 isexposed. Minute numerals 0, 15, and 45 are shown dotted but it will beunderstood that the rest oi the minute numerals are located in a ringcon-- taining them. In a similar manner, annular minute disc or plate 86is rotatably mounted just inside of casing 15, having its opening 81smaller than and concentric with opening 80 in the rear of said casing.The hour numerals of the upper set 11 successively appear at the rear ofthe clock encircled by opening 81. A minute window, not shown, similarto minute window 82, is provided for minute disc 86 which as said discrotates exposes the successive minute numerals, not seen, located onannular plate 88 fixed by stays 89 to the inside of casing 15. Theopening in plate 88 is substantially coincident with opening 81.

Motor 90 drives shaft 9| which has a cam, not

seen, similar to cam 33, Figs. 2 and 3, fixed to it which operatessimilar mechanism to that shown in said figures for engaging rock teeth92 inside of hour ring 16 for rotating said ring one-twelfth of arevolution every hour. Bevel gear 93, fixed to the upper end of shaft 9|meshes with bevel gear 94 fixed to short shaft 95. Bevel gear 96 is alsofixed to short shaft 95 and drives on one side bevel gearing 91 fixed tominute disc 8| and on the other side bevel gear ring 98 iixed to minutedisc 86. By the train of gears 'just described,

the rate of one revolution per hour for exposing through their minutewindows on opposite faces of the clock the ring of minute numerals onplates 83 and 88. The rotation o! hour ring16 presents the successivehour numerals, on opposite faces of the clock, inside the rings ofminute numerals. I

Instead of using an hour ring, the clock illustrated in Figs. 17, 18 and19 uses an endless iiexible band or belt 99 with the hour numeralsthereon, the hour numeral 3 in Fig. 17 being one of said numerals.Casing |00 has an opening |0| in front. Rotatably mounted on casing |00,is an annular minute plate |02 having its opening |03 concentric withopening |0|. Back of plate |02 is another annular plate. |04, the minutenumeral plate, fixed to casing |00by stays |05. The opening in minutenumeral plate |04 is concentric wih opening |03 in minute plate |02.Minute numeral plate |04. has the minute numerals arranged in a ringabout its opening, the minute numeral 45 `in Fig. 17 being one of saidnumerals. Minute plate |02 is provided with a minute window |06, whichas said plate rotates exposes the successive minute numerals located onminute numeral plate |04. For the position of minute window |06 shown inFig. 17, minute numeral 4 5 is exposed. Endless' band 99 is mounted onidler rollers |01 supported on extensions |09 of cross piece |08 iixedto the casing, said band being held taut and driven by pin wheel ||0,the pins of which engaging corresponding perforations in said band. Aguide |22 keeps the forward run of band 99 close to opening |03.

Motor ||2, by means of shaft ||3 and worm ||4 fixed to it, driveswormwheel H5 fixed to shaft ||6. Bevel gear ||1 engages 4the ring ||8 ofbevel gear teeth fixed to the rear of minute plate |02 for rotating thelatter at the rate of one revolution per hour. A pawl I9 as explainedAfor the clock of Fig. 3 is tripped once an hour by the revolution ofcam fixed to shaft ||6, said pawl engaging ratchet teeth |2| on theinside of pin Wheel ||0. Each time pawl ||9 istripped a new hour numeralis presented at window |03.

I claim:-

1. A clock comprising a casing, a drum rotatablyvmounted in said casingwith the periphery of said drum adapted to rotate by the front of thecasing, said drum presenting on its periphery numerals representinghours, said casing having an opening in its front opposite the drum, therotation of the drum presenting at said opening its successive hournumerals, a fixed ring of minute numerals around said opening, and arotatlably mounted member at the front of the casing having an openingtherein opposite the opening in the casing, enabling the Successive hournumerals to be exposed through both openings, said member having anindex for showing the successive minute numerals as it passes aroundsaid ring.

2. A clock comprising a casing member, a drum rotatably mounted in saidcasing member with the periphery of the drum adapted to rotate by thefront of the casing member, said drum presenting on its peripherynumerals representing hours, said casing member having an opening in itsfront opposite the drum, the rotation of the drum presenting at saidopening its successive hour numerals, and a rotatably mounted platemember' at the front of the casing member havingy an openingtherein'opposite theopening in the casing member, enabling thesuccessive hour numerals to be exposed through both openings, one ofsald'members as viewed from the front having a ring of minute numeralssurrounding its opening, the other of said members having an index forsuccessively indicating the minute numerals as said plate member isrotated.

3. A clock comprising a casing, a drum rotatably mounted in the casingwith the periphery of the drum adapted to rotate by the front ot thecasing, said drum presenting on its periphery numerals representinghours, said casing having an opening in its front opposite the drum. therotation of the drum presenting at said opening its successive hournumerals, said casing having a ring of minute numerals `around saidopening,

and a rotatably mounted member for successively indie-ating the minutenumerals, said member leaving a substantially unobstructed view of thehour numeral through the opening in the casing.

4. A clock comprising a casing, a drum rotatably mounted in the casingwith the periphery of the drum adapted to rotate by the front of thecasing, said drum presenting on its periphery numerals representinghours, said casing having an opening in its front opposite the drum, therotation of the drum presenting at said opening its successive hournumerals, a member rotatably mounted at the front of the casing, saidmember having a ring of minute numerals surrounding said opening, andindexing means carried by the casing for indicating the successiveminut/e numerals as they rotate about said opening.

5. A clock comprising a casing having a spherical surface, a drumsubstantially in the form of a spherical zone rotatably mounted in thecasing with the periphery of the drum substantially concentric with saidspherical surface and adapted to rotate by the front of the casing, saiddrum presenting. on its periphery numerals representing hours, saidcasing having an opening in its front opposite the drum, the rotation ofthe drum presenting at said opening its successive hour numerals, saidcasing having a ring of minute numerals around said opening, and a platehaving a spherical surface rotatably mounted at the front of the casingsubstantially concentric with the spherical surface of the latter andhaving an opening therein opposite the opening in the casing, enablingthe successive hour numerals to be exposed through both openings, saidplate being provided with a window and covering up the ring of minutenumerals except at the window for successively showing the minutenumerals as said plate is rotated.

6. A clock comprising a casing having a spherical surface, a drumsubstantially in the form of a spherical zone rotatably mounted in thecasing with the periphery of the drum substantially concentric With saidspherical surface and adapted to rotate by the front of the casing, saiddrum presenting on its periphery numerals representing hours, saidcasing having an opening in its front opposite the drum, the rotation ofthe drum presenting at said opening its successive hour numerals, and aplate having a spherical surface rotatably mounted at the front of thecasing substantially concentric with the spherical surface of the latterand having an opening therein opposite the vopening in the casing,enabling the successive hour numerals to be exposed through bothopenings, said plate having a ring of minute numerals surrounding itsopening, and indexing means on the casing for indicating the successiveminute numerals4 as they rotate about said opening.

7. A clock as claimed in claim 2 in which the periphery of the drum issubstantially inscribed in the casing, the cross-sections of the drumand the casing being substantially regular geometric figures.

8. A clock comprising a casing member having a spherical surface, a drumsubstantially in the form of a spherical zone rotatably mounted in thecasing, the outside radius of the drum being substantially equal to theinside radius of the casing member opposite the sphericalsurface, saiddrum presenting numerals representing hours, said casing member havingan opening in its front opposite the drum, the rotation of the drumpresenting at said opening its successive hour numerals, and a rotatablymounted member at the front of the casing member having an openingtherein opposite the opening in the casing member, enabling thesuccessive hour numerals to be exposed through both openings, one ofsaid members having a ring of minute numerals about its opening, theother of said members having an index successively indicating the minutenumerals its successive hour numerals, and a rotatably mounted member atthe front of the casing member having its axis of rotation substantiallyat right angles to said axis of rotation of the drum leaving asubstantially unobstructed view of the hour numeral at the opening, oneof said members having a ring oi minute numerals about said opening, theother of said members having an index for successively indicating theminute numerals as said rotatably mounted member is rotated.

10. A clock comprising a casing, a drum rotatably mounted in the casingwith the periphery of the drum adapted to rotate by the front of' thecasing, the axis of rotation of the drum extending in a general up anddown direction, said drum presenting numerals representing hours, saidcasing having an opening in its front opposite the drum, the rotation ofthe drum presenting at said opening its successive hour numerals,

and a rotatablymounted plate at the front of the casing having anopening therein in register with the opening yin the casing, enablingthe successive hour numerals to be exposed through bothl openings, theaxis of rotation of said 4plate being substantially perpendicular to andintersecting the axis of rotation of the drum, said casing having a ringof minute numerals about its opening, said plate being provided with anindex for successively indicating the minute numerals as the plate isrotated.

11. A clock comprising a casing member, a drum rotatably mounted in saidcasing member with the periphery of the drum adapted to rotate by thefront of the casing member, said drum presenting on its peripherynumerals representing hours, said casing member having an opening in itsfront opposite the drum, the rotation of the drum presenting at saidopening its successive hour numerals, mechanism for intermittentlyrofill tating the drum step by step, the drum after each step ofrotation presenting its next hour numeral at the opening, a rotatablymounted member at the front of the casing member leaving a substantiallyunobstructed view of the hour numeral at the opening, the axis ofrotation of the drum and the axis ofcotation of the rotatably mountedmember making a substantial angle with each other, mechanism forrotating said latter member, one of said members having a ring of minutenumerals about said opening as viewed from the iront, the other of saidmembers having an index for successively indicating the minute numeralsas said rotatably mounted member is rotated.

12. A clock comprising a casing, a drum rotatably mounted in said casingwith the periphery of the drum adapted to rotate by the front of thecasing, said .drum-presenting on its periphery numerals representinghours, said casing having an opening in its front opposite the drum, therotation of the drum presenting at said opening its successive hournumerals, mechanism for intermittently rotating the drum step by step,the drum after each step of rotation presenting its next hour numeral atthe opening, a rotatably mounted member at the front of the casinghaving an opening therein opposite the opening in the casing, enablingthe successive hour numerals to be exposed through both openings,mechanism for rotating the member, and a ring of minute numerals held bythe casing and surrounding the openings as viewed from in front, saidmember being provided with an index successively indicating the minutenumerals as it rotates 13. A clock comprising a casing having aspherical surface, a drum substantially in the form of a spherical zonesubstantially concentric with the casing opposite its spherical surface,said drum presenting on its periphery numerals representing hours, saidcasing having an opening in its front opposite the drum, the rotation ofthe drum presenting at said opening its successive hour numerals,mechanism for intermittently rotating the drum step by step, the drumafter each step ol rotation presenting its next hour numeral at theopening, a rotatably mounted member at the front of the casing having anopening therein opposite the opening in the casing, enabling thesuccessive hour numerals to be exposed through both openings, mechanismfory rotating the member, and a ring of minute numerals held by thecasing and surrounding the openings as viewed u from in front, saidmember being provided with merals as it rotates.

14. A clock comprising a casing member, a device movably mounted in saidcasing member having an outer surface adapted to move by the front ofthe casing member, said device presenting numerals representing hours,said casing member having an opening in its front for exposing a portionof said surface, the motion of said device presenting at 'said openingits successive hour numerals, and a rotatably mounted member at thefront of the casing member having its axis of rotation substantially atright angles to the direction of motion of said surface at said openingand leaving a substantially unobstructed view of the hour numeral at theopening, one of said members having a ring of minute numerals about saidopening, the other of said members having an index for successivelyindicating the minute numerals as said rotatably mounted member isrotated.

15. A clock comprising a casing member, a device movably mounted in saidcasing member having an outer surface adapted to move by the front ofthe casing member, said device presenting numerals representing hours,said casing member having an opening in its front for exposing a portionof said surface, the motion of said device Apresenting at said openingits successive hour numerals, and a rotatably mounted member at thefront of the casing member having an opening therein opposite theopening in the casing member, enabling the successive hour numerals tobe exposed through both openings, one

of said members having a ring of minute numerals about its opening, theother of said mem.- bers having an index successively indicating theminute numerals as said member is rotated.

16. A clock comprising a casing, a device movably mounted in said casinghaving an outer surface adapted to move by the front of the casing, saiddevice presenting numerals representing hours, said casing having anopening in its front for exposing a portion of said surface, the motionof said device presenting at said opening its successive hour numerals,and a rotatably mounted member at the front of the casing having anopening therein in register with the opening in the casing, enabling thesuccessive hour numerals to be exposed. through both openings, saidcasing having a ring of minute numerals about its opening, said memberbeing provided with an index for successively indicating the minutenumerals as said member is rotated.

NATHAN GEORGE HORWITT.

